JP2021052945A - Foothold metal fitting which also serves as fitting metal fitting for fall prevention device for steel pipe beam - Google Patents

Abstract

To provide a foothold metal fitting which also serves as a fitting metal fitting for a fall prevention device for a steel pipe beam, and which is suitable for a steel pipe beam extending in a horizontal direction to the ground.SOLUTION: There is provided a foothold metal fitting 1 which also serves as a fitting metal fitting for a fall prevention device for a steel pipe beam, and which is fitted to an outer peripheral face of a steel pipe beam 4 extending in a horizontal direction by a band metal fitting 2. The foothold metal fitting comprises: a base body 11 on which the band metal fitting 2 passes on a front surface side thereof and is pressed to the outer peripheral face of the steel pipe beam 4, and a rear surface side contacts the outer peripheral face of the steel pipe beam 4; a metal fitting body 12 provided on the front surface side of the base body 11; and metal fittings 13, 13 for junction reinforcement, for jointing the metal fitting body 12 to the base body 11 by weld or the like and reinforcing.SELECTED DRAWING: Figure 8

Description

The present invention relates to a fall prevention device mounting bracket and scaffolding bracket for a steel pipe beam, which is attached to the outer peripheral surface of a steel pipe beam extending in the horizontal direction by a band bracket.

Various hooking brackets for hooking a hook or a ladder on a utility pole or the like when working on a utility pole or the like have been proposed (see, for example, Patent Documents 1 and 2).

Japanese Unexamined Patent Publication No. 9-117025 Japanese Unexamined Patent Publication No. 11-6330

However, since the metal fittings described in Patent Documents 1 and 2 are hook metal fittings for electric poles and the like standing perpendicular to the ground, there is a problem that they are not suitable for steel pipe beams extending in the horizontal direction with respect to the ground. There is.

In particular, since the cross-sectional shape of the steel pipe beam is usually circular, there arises a problem that the metal fitting to be attached is slippery in the case of the steel pipe beam having a circular cross-sectional shape.

Therefore, the present invention has been made focusing on such a problem, and an object of the present invention is to provide a fall prevention device mounting bracket and scaffolding bracket for a steel pipe beam suitable for a steel pipe beam extending horizontally with respect to the ground. ..

In order to solve the above problems, the steel pipe beam fall prevention device mounting bracket and scaffolding bracket according to the present invention is a steel pipe beam fall prevention device mounting bracket and scaffolding bracket that is attached to the outer peripheral surface of the steel pipe beam extending in the horizontal direction by a band bracket. It has a base body in which the band metal fitting passes through the front surface side and is pressed against the steel pipe beam, and the back surface side abuts on the outer peripheral surface of the steel pipe beam, and a metal fitting body provided on the front surface side of the base body. It is characterized by that.
Further, in the fall prevention device mounting bracket and scaffolding bracket for steel pipe beams according to the present invention, the bracket body is formed in a U shape so that the hooking bracket can be hooked and becomes a scaffolding for workers. It is also a feature.
Further, the fall prevention device mounting bracket and scaffolding bracket for a steel pipe beam according to the present invention is also characterized in that the bracket body is made of deformed steel bar.
Further, in the fall prevention device mounting bracket and scaffolding bracket for a steel pipe beam according to the present invention, the band bracket is provided with a plurality of elongated hole-shaped slit holes separated by a predetermined interval, and is on the surface side of the base body. It is also characterized in that the passage of the band metal fitting is provided with a convex portion that fits into the slit hole of the band metal fitting.
Further, in the fall prevention device mounting bracket and scaffolding bracket for a steel pipe beam according to the present invention, the convex portions provided on the surface side of the base body are 2 at the same interval as the predetermined interval between the plurality of slit holes of the band bracket. It is also characterized by being provided with one.
Further, in the fall prevention device mounting bracket and scaffold fitting for a steel pipe beam according to the present invention, the steel pipe beam has a circular cross section and a plurality of outer diameters, and the back surface side of the base body has a plurality of outer diameters. Among the plurality of steel pipe beams having an outer diameter, the steel pipe beam having the smallest outer diameter is curved at a diameter equal to or less than the outer diameter of the steel pipe beam.

The fall prevention device mounting bracket and scaffolding bracket for a steel pipe beam according to the present invention has a base body in which the band metal fitting passes through the front surface side and is pressed against the steel pipe beam, and the back surface side abuts on the outer peripheral surface of the steel pipe beam. A band through portion is provided through which a banded metal fitting passes through the metal fitting body provided on the side, and has a base body whose back surface side abuts on the outer peripheral surface of the steel pipe beam and a metal fitting body provided on the front surface side of the base body.
Therefore, it is possible to provide a fall prevention device mounting bracket and scaffolding bracket for a steel pipe beam suitable for a steel pipe beam extending in a horizontal direction with respect to the ground.
In particular, when the metal fitting body is hooked by the hook metal fitting and formed in a U shape so as to serve as a scaffolding for workers, it is safe for the steel pipe beam fall prevention device mounting metal fitting and scaffolding metal fitting attached to the steel pipe beam. By hooking the strap bracket, you can safely ascend the pillar, and by using the bracket body as a scaffold, you can work and move safely.

It is explanatory drawing which shows the use state of the hook for a steel pipe beam of embodiment which concerns on this invention. (A) and (b) are perspective views of the fall prevention device mounting bracket and scaffolding bracket for a steel pipe beam according to the embodiment of the present invention, respectively. (A) and (b) are bottom view and side view of the fall prevention device mounting bracket and scaffolding bracket for a steel pipe beam according to the embodiment of the present invention, respectively. (A) and (b) are a front view and a cross-sectional view taken along the line AA of the fall prevention device mounting bracket and scaffolding bracket for a steel pipe beam according to the embodiment of the present invention, respectively. It is a perspective view which shows the base body which constitutes the fall prevention device mounting metal fitting and scaffolding metal fitting for a steel pipe beam of embodiment, the metal fitting for joint reinforcement, and the metal fitting body, respectively, (a) to (c). It is a perspective view of the known band metal fitting which fixes the fall prevention device mounting metal fitting and the scaffolding metal fitting for the steel pipe beam of embodiment which concerns on this invention to a replacement beam. (a) and (b) are side views and front views of known band metal fittings for fixing the fall prevention device mounting metal fittings and scaffolding metal fittings for a steel pipe beam according to the embodiment of the present invention to the replacement beam, respectively. It is an enlarged perspective view which shows the state which attached the fall prevention device mounting metal fitting and scaffolding metal fitting for a steel pipe beam of embodiment to a steel pipe beam by a band metal fitting. It is an enlarged front view which shows the state which attached the fall prevention device mounting metal fitting and scaffolding metal fitting for a steel pipe beam of embodiment to a steel pipe beam by a band metal fitting. 9 is a cross-sectional view taken along the line BB in FIG.

Hereinafter, embodiments of the fall prevention device mounting bracket and scaffolding bracket for a steel pipe beam according to the embodiment of the present invention will be described with reference to the drawings. The embodiments described below are merely examples of the present invention, and the present invention is not limited to the following embodiments, and can be appropriately modified within the scope of the technical idea of the present invention.

<Structure of Fall Prevention Device Mounting Bracket and Scaffolding Bracket 1 for Steel Pipe Beam of the Embodiment>
As shown in FIG. 1, the fall prevention device mounting bracket and scaffolding bracket 1 for a steel pipe beam according to the embodiment of the present invention is located between the columns 3 and 3 erected on both sides of a railroad track (not shown). It is passed and attached to the outer peripheral surface of the steel pipe beam 4 extending in the horizontal direction by a known band metal fitting 2, and is provided on the base body 11 and the surface side of the base body 11 as shown in FIGS. The metal fitting body 12 and a pair of joint reinforcing metal fittings 13 and 13 are joined by welding or the like. In FIG. 1, 5 is a hook and 6 is a wire such as a lifeline.

(Base body 11)
As shown in FIGS. 8 and 9 described later, the base body 11 is pressed against the steel pipe beam 4 through the band metal fitting 2 on the front surface side, and the back surface side abuts on the outer peripheral surface of the steel pipe beam 4. The passage of the band metal fitting 2 is provided with convex portions 11a and 11a that fit into the slit holes 22b and 22b of the band metal fitting 2, which will be described later.

Here, the convex portions 11a and 11a provided on the front surface side of the base body 11 are formed by extruding from the back surface side of the base body 11. Therefore, recesses 11b and 11b are formed on the back side (opposite side) of the convex portions 11a and 11a by extrusion molding as shown in FIG. 4B, and the recesses 11b and 11b edges come into contact with the outer peripheral surface of the steel pipe beam 4. When it is done, it becomes non-slip.

Here, the distance between the convex portions 11a and 11a provided on the surface side of the base body 11 is the same as the distance between the plurality of slit holes 22b and 22b of the band metal fitting 2.

Further, the steel pipe beam 4 has a plurality of outer diameters, and for example, in general, most of the steel pipe beams 4 have an outer diameter of about 267 mm to 340 mm. Therefore, the back surface side of the base body 11 has an inner diameter R equal to or less than the outer diameter of the steel pipe beam 4 having the smallest outer diameter among the plurality of steel pipe beams 4 having an outer diameter. It is curved with an inner diameter of about 260 mm, which is 267 mm or less.

Therefore, even if the outer diameter of the steel pipe beam 4 changes, the upper and lower ends of the base body 11 always abut on the surface of the steel pipe beam 4, so that the fall prevention device for the steel pipe beam corresponds to the change in the outer diameter of the steel pipe beam 4. It is possible to prevent the mounting bracket and scaffolding bracket 1 from shifting or rotating.

(Metal fitting body 12)
The metal fitting body 12 is formed by, for example, bending both ends of a D16 mm deformed steel bar so that a known hook metal fitting 5 (see FIG. 1) used for a safety belt or the like can be hooked and can also be used as a scaffolding for workers. As shown in FIG. 3A, the width W is formed in a U shape of about 230 mm, and the height H including the base body 11 is about 120 mm. Here, the reason why the deformed steel bar is used as the metal fitting body 12 is that the metal fitting body 12 is used not only as a hook for the hook metal fitting 5 but also as a scaffolding. This is to make it hard to slip.

(Metal fittings for joint reinforcement 13, 13)
The joining reinforcing metal fittings 13 and 13 are used as a pair to join the metal fitting body 12 to the base body 11 by welding or the like, and each of them is a band metal fitting thread for passing the band metal fitting 2 in the center in the longitudinal direction. While the recesses 13a are provided, the holes 13b and 13b for draining the plating solution are provided on both sides of the recesses 13a for passing the band metal fittings, respectively.

(Band metal fitting 2)
The band metal fitting 2 is known as shown in FIGS. 6 and 7 (a) and 7 (b), and is also called a universal band. For example, the band metal fitting 2 is disclosed in Japanese Patent Application Laid-Open No. 2006-271025.

That is, as shown in FIGS. 6 and 7 (a) and 7 (b), the band metal fittings 2 have a plurality of through holes 21a (here, for example, three) at a predetermined interval on one end side. , 21a are formed, and a pair of main band pieces 21 and 21 and a pair of main band pieces 21 and 21 are formed on the other end side, respectively. Of the through holes 21a, one of the plurality of through holes 21a, 21a formed on the side, and the through holes 22a, 22a formed on both sides (here, for example, four). A pair of main band pieces 21 are provided with auxiliary band pieces 22 for connecting a pair of main band pieces 21 and 21 by connecting bolts 23 and 23 and connecting nuts 24 and 24, respectively, by matching any one of the through holes 22a. The tightening receiving portions 21a and 21a on the other end side of the parts 21 are configured to be tightened by the tightening bolt 25 and the tightening nut 26 through the bolt holes formed therein so that they can be wound around the steel pipe beam 4.

The auxiliary band piece 22 is provided with two elongated hole-shaped slit holes 22b separated by a predetermined interval L as shown in FIGS. 6 and 7A.

<Mounting state of the fall prevention device mounting bracket and scaffolding bracket 1 for the steel pipe beam according to the embodiment of the present invention>
When the fall prevention device mounting bracket and scaffolding bracket 1 for the steel pipe beam of the embodiment configured as described above is attached to the steel pipe beam 4 by using the band bracket 2, the state as shown in FIGS. 8 to 10 is obtained. .. In addition, in FIG. 8, in order to prevent the state where the convex portions 11a and 11a on the surface side of the base body 11 are fitted into the slit holes 22b and 22b of the band metal fitting 2 which will be described later are hidden, the joint reinforcing metal fittings 13 and 13 are centered. Notched and illustrated.

The distance between the convex portions 11a and 11a provided on the surface side of the base body 11 is the same as the distance L between the plurality of slit holes 22b and 22b of the band metal fitting 2, and therefore, from FIGS. 8 to 10. As is clear, the convex portions 11a and 11a provided on the surface side of the base body 11 are located at the ends of the elongated hole-shaped slit holes 22b and 22b, which are separated by a predetermined distance L from the auxiliary band pieces 22 of the band fitting 2, respectively. It will fit.

Therefore, the hook metal fitting 5 (see FIG. 1) at the tip of the wire 6 can be hooked on the metal fitting body 12 of the steel pipe beam fall prevention device mounting bracket and scaffolding metal fitting 1, or the worker's foot can be placed on the metal fitting body 12. Even when the scaffolding is used, the convex portions 11a and 11a provided on the surface side of the base body 11 are non-slip, so that it is possible to prevent the steel pipe beam fall prevention device mounting bracket and scaffolding bracket 1 from shifting or rotating. it can.

Further, the convex portions 11a and 11a of the base body 11 are the same as the predetermined intervals L of the slit holes 22b and 22b of the auxiliary band piece 22 of the band metal fitting 2, and as shown in FIGS. 8 to 10, the two convex portions 11a, Since 11a fits tightly into the ends of the slit holes 22b and 22b of the auxiliary band piece 22, it is possible to use the steel pipe beam fall prevention device mounting bracket and scaffolding bracket 1 without worrying about the vertical direction, and workability is achieved. It is possible to improve the usability of the fall prevention device mounting bracket and scaffolding bracket 1 for steel pipe beams.

Further, since the recesses 11b and 11b are formed on the back side of the convex portions 11a and 11a of the base body 11, the band metal fitting 2 is used to replace the steel pipe beam fall prevention device mounting bracket and scaffolding bracket 1 of the embodiment with the steel pipe beam 4. When pressed and fixed, the recesses 11b and 11b on the back side of the base body 11 come into contact with the outer peripheral surface of the steel pipe beam 4 to prevent slipping. Can be prevented.

<Main effects of the fall prevention device mounting bracket and scaffolding bracket 1 for a steel pipe beam according to the embodiment of the present invention>
As described above, in the fall prevention device mounting bracket and scaffolding bracket 1 for a steel pipe beam according to the embodiment of the present invention, the band bracket 2 passes through the front surface side and is pressed against the steel pipe beam 4, and the back surface side is the outer periphery of the steel pipe beam 4. It has a base body 11 that comes into contact with the surface, and a metal fitting body 12 provided on the surface side of the base body 11.

Therefore, it is possible to provide the steel pipe beam fall prevention device mounting bracket and scaffolding bracket 1 for the steel pipe beam 4 extending in the horizontal direction with respect to the ground while using the existing band metal fitting 2.

In particular, in the fall prevention device mounting bracket and scaffolding bracket 1 for a steel pipe beam according to the embodiment of the present invention, the bracket body 12 is formed in a U shape so that the hooking bracket 5 is hooked and serves as a scaffolding for workers. Therefore, by hooking the safety belt hooking bracket 5 to the steel pipe beam fall prevention device mounting bracket and scaffolding bracket 1 attached to the steel pipe beam 4, the pillar can be safely ascended, and the metal fitting body 11 is also attached. By using it as a scaffold, it becomes possible to work and move safely.

Further, in the fall prevention device mounting bracket and scaffolding bracket 1 for a steel pipe beam according to the embodiment of the present invention, since the bracket body 12 is made of deformed steel bar, it will come off when the hooking bracket 5 is hooked on the bracket body 12. In addition to being difficult, when the metal fitting body 12 is used as a scaffold or the like, the sole of the shoe becomes hard to slip, and safety can be improved.

Further, in the fall prevention device mounting bracket and scaffolding bracket 1 for a steel pipe beam according to the embodiment of the present invention, the band bracket 2 is provided with a plurality of elongated hole-shaped slit holes 22b, 22b separated by predetermined intervals, and is a base. Convex portions 11a, 11a that fit into the slit holes 22b, 22b of the band metal fitting 2 are provided in the passage of the band metal fitting 2 on the surface side of the body 11.

Therefore, according to the fall prevention device mounting bracket and scaffolding bracket 1 for the steel pipe beam according to the embodiment of the present invention, the convex portions 11a and 11a provided on the surface side of the base body 11 are non-slip, so that the band bracket 2 When the steel pipe beam fall prevention device mounting bracket / scaffolding bracket 1 is attached to the steel pipe beam 4 extending in the horizontal direction, the steel pipe beam fall prevention device mounting bracket / scaffolding bracket 1 can be prevented from shifting or rotating. It is possible to provide a highly safe fall prevention device mounting bracket and scaffolding bracket 1 for a steel pipe beam.

Further, in the steel pipe beam fall prevention device mounting bracket and scaffolding bracket 1 according to the present invention, the convex portions 11a and 11a provided on the surface side of the base body 11 have a plurality of slit holes 22b and 22b of the band bracket 2. Since two are provided at the same interval as the predetermined interval L between them, the steel pipe beam fall prevention device mounting bracket and scaffolding bracket 1 has a vertically symmetrical shape and can be used without worrying about the vertical direction, so that workability is possible. It is possible to improve the usability of the fall prevention device mounting bracket and scaffolding bracket 1 for steel pipe beams.

Further, in the fall prevention device mounting bracket and scaffolding bracket 1 for a steel pipe beam according to the embodiment of the present invention, the convex portions 11a and 11a provided on the surface side of the base body 11 push out the base body 11 from the back side of the base body 11. As a result, the recesses 11b and 11b are formed on the back side of the convex portions 11a and 11a, so that when the edges of the recesses 11b and 11b on the back side of the base body 11 come into contact with the outer peripheral surface of the steel pipe beam 4, they become non-slip. Also in this respect, it is possible to prevent the steel pipe beam fall prevention device mounting bracket / scaffolding bracket 1 from shifting or rotating, and it is possible to provide the steel pipe beam fall prevention device mounting bracket / scaffolding bracket 1 with high safety.

Further, in the fall prevention device mounting bracket and scaffolding bracket 1 for a steel pipe beam according to the present invention, the steel pipe beam 4 has a plurality of outer diameters, and the back surface side of the base body 11 has a plurality of outer diameters. Of the steel pipe beams 4 of the above, the outer diameter is curved at a diameter equal to or less than the outer diameter of the steel pipe beam 4 having the smallest outer diameter.

Therefore, according to the fall prevention device mounting bracket and scaffolding bracket 1 for the steel pipe beam according to the embodiment of the present invention, when the outer diameter of the steel pipe beam 4 changes, the upper and lower ends of the base body 11 are on the surface of the steel pipe beam 4. Since it comes into contact with the steel pipe beam 4, it is possible to respond to changes in the outer diameter of the steel pipe beam 4, and it is possible to prevent the steel pipe beam fall prevention device mounting bracket and scaffolding bracket 1 from shifting or rotating, resulting in a highly safe steel pipe beam. It is possible to provide a fall prevention device mounting bracket and a scaffolding bracket 1.

1 Fall prevention device mounting bracket and scaffolding bracket for steel pipe beam 11 Base body 11a Convex part 11b Recessed part 12 Metal fitting body 13 Joining reinforcement metal fittings 13a Band metal fittings Passing recess 13b Plating liquid drain hole 2 Band metal fittings 21 Main band piece 22 Auxiliary band piece 22b Slit hole 3 Strut 4 Steel pipe beam (steel pipe beam)
5 Hook metal fittings 6 Wire

Claims (6)

It is a fall prevention device mounting bracket and scaffolding bracket for steel pipe beams that is attached to the outer peripheral surface of the steel pipe beam extending in the horizontal direction by band metal fittings.
The band metal fittings pass through the front surface side and are pressed against the steel pipe beam, and the back surface side has a base body that abuts on the outer peripheral surface of the steel pipe beam and a metal fitting body provided on the front surface side of the base body. Fall prevention device mounting bracket and scaffolding bracket for steel pipe beams. In the fall prevention device mounting bracket and scaffolding bracket for steel pipe beams according to claim 1,
The metal fitting body is a fall prevention device mounting metal fitting and scaffolding metal fitting for a steel pipe beam, characterized in that the hook metal fitting can be hooked and is formed in a U shape so as to serve as a scaffolding for workers. In the fall prevention device mounting bracket and scaffolding bracket for a steel pipe beam according to claim 1 or 2.
The metal fitting body is a fall prevention device mounting metal fitting and scaffolding metal fitting for a steel pipe beam, which is characterized by being made of deformed steel bars. In the fall prevention device mounting bracket and scaffolding bracket for a steel pipe beam according to any one of claims 1 to 3.
The band metal fitting is provided with a plurality of elongated hole-shaped slit holes separated by a predetermined interval.
A fall prevention device mounting bracket and scaffolding bracket for a steel pipe beam, which is on the surface side of the base body and is provided with a convex portion that fits into a slit hole of the band bracket in the passage of the band bracket. In the fall prevention device mounting bracket and scaffolding bracket for a steel pipe beam according to claim 4.
Two convex portions provided on the surface side of the base body are provided at the same interval as a predetermined interval between the plurality of slit holes of the band metal fitting, and also serves as a fall prevention device mounting metal fitting for a steel pipe beam. Scaffolding metal fittings. In the fall prevention device mounting bracket and scaffolding bracket for a steel pipe beam according to any one of claims 1 to 5.
The steel pipe beam has a circular cross section and has a plurality of outer diameters.
The back surface side of the base body is curved with a diameter equal to or less than the outer diameter of the steel pipe beam having the smallest outer diameter among the plurality of steel pipe beams having an outer diameter. Combined scaffolding metal fittings.

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